Persistence of new insecticides and their efficacy against insect pests of okra.
Persistence and efficacy of bifenthrin (25 and 50 g ai ha(-1)), fipronil (50 and 100 g ai ha(-1)) and indoxacarb (70 and 140 g ai ha(-1)) has been studied in okra fruits. The initial deposits varied from 0.259-0.382 microg g(-1) at low and 0.461-0.688 microg g(-1) at high rate of application. The residues persisted upto 10 days with half-life of 1.32-1.58 days for bifenthrin, 0.65-1.12 days for fipronil and 0.58-1.02 days for indoxacarb. Based on ADI, the suggested waiting period was 1 day for bifenthrin and indoxacarb and 3 days for fipronil. All the insecticides were found effective against leafhopper and shoot and fruit borer.
Gupta
Suman
S
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India. drsumangupta2002@yahoo.com
Sharma
R K
RK
Gupta
R K
RK
Sinha
S R
SR
Singh
Rai
R
Gajbhiye
V T
VT
D028483:Abelmoschus / Q000469:parasitology*; D000818:Animals; D006207:Half-Life; D007313:Insecta; D007306:Insecticides / Q000032:analysis; D010078:Oxazines / Q000032:analysis; D011720:Pyrazoles / Q000032:analysis; D011722:Pyrethrins / Q000032:analysis
D007306:Insecticides; D010078:Oxazines; D011720:Pyrazoles; D011722:Pyrethrins; C401104:indoxacarb; C099952:bifenthrin; C082360:fipronil